@privateger fun fact: if you somehow find a way to inject sponsorblock into the youtube for tv webapp (for example, by spoofing your useragent to a samsung smart tv and going to https://www.youtube.com/tv), you can use it with youtube for smart tvs.

for android based tvs, this is doable by using firefox or one of the extension capable chromium forks (like Kiwi), or just install revanced on it